Does sound work out of the headphone jack? On my SE/30 the no startup chime or sound issue was due to a cracked solder joint on the analog board -12v, this thread got me on that path:
Two questions regarding a recently recapped SE/30: 1. The internal speaker does not emit sound even after cleaning the logic board and recapping all capacitors. I've swapped speakers and checked that all power cables are properly attached. The audio out jack works, producing loud, clear sound...